Patient Bill Pay

QuestDirect Self-Ordered Lab TestsDid you know DLO offers lab testing without a physician's visit? With QuestDirect™, you are able to purchase your own labs from a select list of tests without a doctor's visit. Choose from general health tests, allergy testing, immunity screening, infectious disease testing, and more. For more information, visit

DLO Transitioning to new billing service

DLO is transitioning to a new online billing portal at Upon transition, you may receive billing notifications by text, email, or a new paper bill format. You may use the link in the text or email to pay your bill, or use the link below.

New bill format

If your DLO bill references, has a "ZOT" lab code, and the account number on your bill looks like "123456-QQUD1-14", use this link to pay your bill or update your insurance information:*

Old bill format

If your DLO bill has a "DLO" lab code and a 10-digit bill number, use this link to pay your bill:

Quest Bill Pay


Do you have a question regarding a DLO bill or invoice? Call 1-866-254-3859 and speak to a billing specialist today. You may also email the billing department by clicking the link below:

Email Billing Customer Service*

Quest Diagnostics LogoThrough our affiliation with Quest Diagnostics, DLO is happy to offer a fast, simple and convenient online bill pay service, as well as a tool to update your insurance information. All you need is a copy of your current bill or invoice.

Who is Quest Diagnostics?

Quest Diagnostics is the world's leading provider of diagnostic testing, information and services that patients and doctors need to make better health care decisions. The company offers the broadest access to diagnostic testing services through its network of laboratories and patient service centers, and provides interpretive consultation through its extensive medical and scientific staff. Quest Diagnostics is a pioneer in developing innovative new diagnostic tests and advanced health care information technology solutions that help improve patient care.

*Clicking the "Pay My Bill" or "Email Billing Customer Service" links will take you to the website. This website uses cookies for improvement of quality and user experience. By continuing to this site, you confirm your awareness and acceptance of our use of cookies. For more information or to opt out of the use of cookies, see Quest's Cookies Notice.